对数据库数据操作之查找

package cn.edu.hpu.operate;

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import com.mysql.jdbc.Connection;

public class Select {
private static  String driver = "com.mysql.jdbc.Driver";
private static  String url =  "jdbc:mysql://localhost:3306/数据库名";

public static Connection getConn()
{
Connection conn = null;
try
{
Class.forName(driver);
}
catch(ClassNotFoundException e)
{
e.printStackTrace();
}
try
{
conn = (Connection) DriverManager.getConnection(url,"用户名","密码");

}
catch(SQLException e)
{
e.printStackTrace();
}
return conn;
}
public static void main(String[] args) {
String sql = "select*from student where s_id=具体数值";
Connection cmn = getConn();
try
{
Statement stmt = cmn.createStatement();
ResultSet rs = stmt.executeQuery(sql);

while(rs.next())
{
int m1 = rs.getInt(1);//注意数据库中定义数据类型，写相应的set方法
String m2 = rs.getString(2);
String m3 = rs.getString(3);
int m4 = rs.getInt(4);

System.out.println("查询结果：");
System.out.println( +m1+"\t"+m2+"\t"+m3+"\t"+m4);
}

}
catch(SQLException e)
{
e.printStackTrace();
}
}
}